Wendell Wierenga
CIK 1239956 · View on SEC EDGAR ↗
Insider
First SEC filing: Aug. 12, 2021 · Latest: Aug. 12, 2021
On this page
Insider at
Insider transactions
0 buys (P)
3 sells (S)
Net:
$-1,881,925
+ 18 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
18 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 5, 2026 | CYTK | S | 4,032 | $75.00 | $302,400 | 32,637 Direct | -11.00% | Disposed | 3.3% (price as of 2026-08-21) |
| Dec. 22, 2025 | CYTK | S | 20,000 | $66.14 | $1,322,800 | 32,444 Direct | -38.14% | Disposed | 17.1% (price as of 2026-08-21) |
| Oct. 27, 2025 | CYTK | S | 4,375 | $58.68 | $256,725 | 32,444 Direct | -11.88% | Disposed | 32.0% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| June 18, 2026 | CRNX | Stock Option (Right to Buy) | Common Stock (9,730) | $35.87 | June 18, 2036 | 9,730 | Acquired |
| May 27, 2026 | CYTK | Non-Qualified Stock Option (Right to Buy) | Common Stock (4,301) | $77.15 | May 26, 2036 | 4,301 | Acquired |
| May 5, 2026 | CYTK | Non-Qualified Stock Option (Right to Buy) | Common Stock (4,032) | $12.40 | Jan. 3, 2027 | 4,032 | Disposed |
| Dec. 22, 2025 | CYTK | Non-Qualified Stock Option (Right to Buy) | Common Stock (20,000) | $7.61 | May 18, 2026 | 20,000 | Disposed |
| Oct. 27, 2025 | CYTK | Non-Qualified Stock Option (Right to Buy) | Common Stock (4,375) | $10.00 | Jan. 4, 2026 | 4,375 | Disposed |
| Jan. 3, 2022 | DRMAW | Stock Option (right to buy) | Common Stock (5,000) | $1.88 | Jan. 2, 2032 | 5,000 | Acquired |
| Aug. 17, 2021 | DRMAW | Series 1d Preferred Stock | Common Stock (8,163) | — | — | 55,078 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.